<template>
  <div class='sub-sort'>
    <div class="sort">
      <a :class="{active:sortParams.sortField===undefined}" @click="changeSort(undefined)" href="javascript:;">默认排序</a>
      <a :class="{active:sortParams.sortField==='publishTime'}" @click="changeSort('publishTime')" href="javascript:;">最新商品</a>
      <a :class="{active:sortParams.sortField==='orderNum'}" @click="changeSort('orderNum')" href="javascript:;">最高人气</a>
      <a :class="{active:sortParams.sortField==='evaluateNum'}" @click="changeSort('evaluateNum')" href="javascript:;">评论最多</a>
      <a @click="changeSort('price')" href="javascript:;">
        价格排序
        <i class="arrow up" :class="{active:sortParams.sortField==='price'&&sortParams.sortMethod=='asc'}" />
        <i class="arrow down" :class="{active:sortParams.sortField==='price'&&sortParams.sortMethod=='desc'}" />
      </a>
    </div>
    <div class="check">
      <XtxCheckbox v-model="sortParams.inventory">仅显示有货商品</XtxCheckbox>
      <XtxCheckbox v-model="sortParams.onlyDiscount">仅显示特惠商品</XtxCheckbox>
    </div>
  </div>
</template>
<script lang="ts">
export default {
  name: 'SubSort'
}
</script>
<script setup lang="ts">
import { reactive, watch } from 'vue'
import { sortFieldType, sortParamsType } from '@/types/paramsTypes'

// 改变排序时,触发父组件方法
const emit = defineEmits(['sortChange'])

// 排序方式(有货商品,特惠商品,排序字段,排序方式)
const sortParams = reactive<sortParamsType>({
    inventory: false,
    onlyDiscount: false,
    sortField: undefined,
    sortMethod: undefined
})
// 改变排序
const changeSort = (sortField: sortFieldType) => {
    if (sortField === 'price') {
        sortParams.sortField = sortField
        if (sortParams.sortMethod === null) {
            // 第一次点击，默认是降序
            sortParams.sortMethod = 'desc'
        } else {
            // 其他情况根据当前排序取反
            sortParams.sortMethod = sortParams.sortMethod === 'desc' ? 'asc' : 'desc'
        }
    } else {
        // 如果排序未改变停止逻辑
        if (sortParams.sortField === sortField)  return
        sortParams.sortField = sortField
        sortParams.sortMethod = undefined
    }
}
watch(() => sortParams, (newVal) => {
  emit('sortChange', newVal)
},{ deep: true })
</script>

<style scoped lang='less'>
.sub-sort {
  height: 80px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  .sort {
    display: flex;
    a {
      height: 30px;
      line-height: 28px;
      border: 1px solid #e4e4e4;
      padding: 0 20px;
      margin-right: 20px;
      color: #999;
      border-radius: 2px;
      position: relative;
      transition: all .3s;
      &.active {
        background: @xtxColor;
        border-color: @xtxColor;
        color: #fff;
      }
      .arrow {
        position: absolute;
        border: 5px solid transparent;
        right: 8px;
        &.up {
          top: 3px;
          border-bottom-color: #bbb;
            &.active {
            border-bottom-color: @xtxColor;
          }
        }
        &.down {
          top: 15px;
          border-top-color: #bbb;
          &.active {
            border-top-color: @xtxColor;
          }
        }
      }
    }
  }
  .check {
    .xtx-checkbox {
      margin-left: 20px;
      color: #999;
    }
  }
}
</style>